So Am I the only person who was wondering what would happen if the Justice League met the X-men? This is based on Justice League pre Unlimited and Wolverine & the X-men. Just a few quick statements about the X-men part, it's going to take place after the explosion, but somewhere before they find Jean. I hope everyone enjoys please read and review for me, thank you!

Clash of the Heroes

Chapter 1: Two Worlds

Batman's fingers clicked a mile a minute on his huge computer system. There had been a lot of odd activity going on with the dimensions and he was worried, although he'd never admit it to anyone. If the Justice Lords were trying another hostile takeover he wanted to be prepared this time. After studying all the other worlds he'd started to notice an unusual difference. All the ones branching off from their world circled around good heroes and the ones branching off from the Justice Lords were based around bad heroes. And then another interesting development had surfaced. The first 'real' world had been uninhabited they had realized, but something no one had noticed the first time around, Batman was starting to uncover. From the original world two branched off from it, when they had originally thought only one did. So instead of there being one form of life that all others had come from there were two originals.

Two species of humans, two inhabited worlds, and then the millions branching off from those two main Earths. Bruce Wayne, the playboy millionaire tapped his fingers on the keyboard, and then his bright blue eyes met pictures. They were of the first world, the few he had been able to snap in his short valiant effort to save all the worlds. It was desolate, dusty grounded, containing no trees or habitation, and a few destroyed looking rock buildings. He assumed it must have had life forms at one point in time but there had been no concrete evidence. Humans couldn't just appear without having any ancestors but this random first world was giving him a run for his money. So many unbelievable things had happened lately that he thought almost anything could be possible now. It was almost impossible to believe that that world had created theirs, let alone create another one totally different and unexplainable. He exited the album on the screen and made his way back to surveying the portals. There were random portals everywhere connecting almost all the worlds together but only a talented select few had the knowledge or ability to use them. The Justice Lords had been one of the few special ones and Batman wanted to make sure that no others would learn the secret of teleportation through the portals; it could be fatal to both worlds and perhaps all worlds.

Bruce turned his attention back to the second main world parallel to theirs. This was a very interesting development. If all the worlds hadn't been formed from just their world then what other unusual people could there be out there? More then he had ever thought possible. And what if some of them were brilliant enough to figure out the teleportation method? Perhaps he should bring this to Clark's attention soon. He knew how much the farm boy hated to be left out of the loop.

"Master Bruce?"

Batman turned slightly to look at his elderly, white haired butler, "What is it Alfred?"

"It's getting late; perhaps you should turn in soon. I've noticed you haven't been up to the Watchtower lately."

Bruce's suit's bright eyes glared at his butler and he turned back to his computer screen as if no words had been spoken. Why did Alfred always have to point out the obvious? Batman was well aware of how often he went and did things since he was the one doing them. It's not like it made a big difference how often he went up to the Watchtower or not anyways. He hated when things were pointed out to him like he was doing something wrong. The Justice League could function perfectly fine without his constant help.

As if on cue his watch started to beep signaling a call from one of the six channel frequencies it received. Who felt like bothering him this late at night today?

He flipped the top open, "Yeah?"

"Batman, you must come to the Watchtower right away something is happening."

Bruce had already jumped up from his chair and was making his way around the batcave, attaching his utility belt around his waist and moving over to his private shuttle. No matter how impassive he seemed about things if the world was in trouble or his friends needed his help, he could never turn his back on them.

"What's the matter J'onn?"

"The portal that the Justice Lords used that time is acting very odd. I don't know if it is just a glitch or if someone is trying to get through."

"I'm on my way," Batman said before his face disappeared out of view from J'onn J'onzz's watch.

Superman landed next to J'onn, "Is he coming?"

"He is on his way," the Martian from Mars replied.

"Don't worry if anything unwanted comes through that portal, I'll just beat them to a pulp and throw them back into it," Hawkgirl stated tapping her mace on the floor menacingly.

Superman nodded rubbing a hand under his nose to stop the smile threatening to show, "I'm sure you would. Just like last time, hmm?"

Hawkgirl's sadistic grin turned to one of rapt embarrassment, "That doesn't count! They caught me off guard; I didn't have a chance to defend myself. It'll never happen again, believe me."

"I believe it," Superman chuckled slightly then turned his attention back to J'onn, "What about Flash, Wonder Woman, and Green Lantern?"

"I called Wonder Woman right before Batman, she is on Themyscira but she'll leave right away."

"I radioed GL he said he'll get here as soon as he can. Flash said he'd run over to Batman's and jump on the shuttle with him," Hawkgirl explained.

"I bet Bruce is thrilled about that."

"I bet so too."

Clark continued, "We really need him to get up here as fast as possible. I'm not really that great with the technical stuff like Bruce and J'onn but the readings from the machine are going haywire, something is definitely going down soon."

"Like I said Superman don't worry about it, I'm sure anything that comes out of that thing we can defeat just like we did with the Justice Lords."

Superman nodded, "I agree but all the same I'd like to be sure. You never know what can happen and I'll feel a lot better when Bruce comes here and says we were just worrying on for no reason."

"You do worry too much Clark, but I understand you're only trying to keep the world safe."

"We're all trying to keep the world safe, Shayera."

J'onn turned away from the conversation and looked at the portal. The stone metal archway was shiny and it had odd markings along the perimeter. It had always had the markings but now it seemed like they were glowing an eerie blue-silver. As he continued to look he saw a sudden stripe shoot down from top to bottom. It almost looked like a static shock, like it was trying to get electricity but was coming up dry. J'onn's red gleaming eyes opened a little wider, he had never seen anything like that before. After seeing the odd pulsating though, J'onn was starting to think they needed to prepare themselves more. The Justice League hadn't expected the portal to be used anytime in the near future because as brilliant and technology savvy as Bruce was, he was only human and hadn't deciphered all the information yet. Immediately J'onn thought that maybe Batman hadn't shared all his knowledge on the subject yet either. Perhaps that was why he had agreed so wholeheartedly and was jumping on his private shuttle to get up here right away.

If something was the matter with the portal or if someone really was trying to get through J'onn hoped that Batman had an idea of what to do, because the Martian was coming up empty on ideas. They hadn't been able to do anything to stop the Justice Lords from coming and had only gotten them to return with the help from Batman's other half. J'onn didn't like the idea of being powerless at all.

Shayera Hol, Thanagarian warrior from another planet also known as Hawkgirl, touched J'onn's arm.

The alien jumped in surprise, being lost in his own thoughts, but then smiled at the girl reassuringly.

"Is everything all right J'onn? You were staring off into space."

"Yes everything is fine."

Just as the words were uttered out of his mouth he felt his head starting to swarm with other people's thoughts. I was just in the mood for peanut butter and jelly. I wonder when John is going to get here. I hope Lois remembers to take out the chicken for dinner; another night of takeout isn't what the doctor ordered. I can't stop looking for her; I can't ever stop trying to find her. Ah don't know if this was the best outfit for meh to wear, it doesn't really go with everythin' else ah have.

Suddenly the world snapped back into focus and his eyes realigned with the scene before him. Shayera was punching Superman on the shoulder, while the man of steel was laughing probably at a joke the other told. J'onn could match up some of the thoughts with who he knew had thought them, but some were completely blank slates. The alien absolutely hated listening to people's thoughts or reading people's minds without their permission, but this had been an accident. And who had those other thoughts belonged to? Sometimes on Earth the thoughts of humans could get jumbled in his mind and he'd get major headaches for listening or hearing too many voices at once but in the Watchtower he almost never had problems. The more time he spent with the Justice League the easier it was to find them mentally because the connection was stronger and it was also easier to block out their thoughts because he knew their brain's wave patterns. Even the regular human mind had its own certain wavelength so he could usually tell if they were inhuman but this was different. The brain patterns of half the thoughts he had just heard were nothing like he'd ever experienced before.

Usually the Martian had some time to organize and reestablish the thoughts so he could get a clearer picture, but not during this episode. This time everything had come at him so quickly he hadn't had a chance to dodge and that didn't happen very often. J'onn turned back to the portal and stared at it long and hard but it didn't pulse again. He actually felt a little disappointed, like he actually expected something to happen with it. He sighed, closed his eyes and leaned back against one of the generators in the main room.

"Did you see that?"

J'onn snapped his eyes back open and turned his attention to Shayera.

"See what?" Superman wondered.

Shayera didn't answer though. She never took her eyes off of the portal.

Immediately Superman turned to look at it and J'onn turned back around again. Just as he did he saw it pulsate again but it was different. The first wave had been an odd green one, but this one was a shining red. Then a third pulse elicited, a few seconds later and it was just plain white. They waited but saw nothing. Shayera glanced around the space station in a rigid manner, seemingly waiting for something to jump out at them. J'onn turned away to the computer and started to tap things onto the keyboard quickly. He pulled up satellites, maps, and longitudinal, latitudinal areas of the world. Could something come through the portal and just land in different areas around the world? It seemed plausible but unlikely. Still he started to look at coordinates nonetheless.

Superman who had been keeping an eye on the portal took a deep breath as it pulsed a beautiful blue-silver light and then a heap of bodies fell to the floor in front of his feet. J'onn quickly turned from the computer to look as the foggy aftermath from the portal started to clear. The Martian watched the portal for any signs of something more but it did not pulsate again and the glowing rocks at the top had turned back to there dull granite-metal coloring. Looks like everything that had tried to come out had succeeded or it had closed down on its own accord. He saw Hawkgirl raise her mace in a defensive way and wait for something to come at her. Her fingers were clutching so hard to the mace that the knuckles were starting to turn white. A dark shape started to move on the floor.

Whatever it was had finally come.